[Paraview] Extract Subset filter, strange behavior

[Paul Melis]

Hi all,

I have an image dataset A (1137x716x834) that was created using the
Extract Subset filter from a larger dataset. It is stored in a .pvti +
8*.vti files. The extents of A are

  X: 514-1650 (dim 1137), Y: 455-1170 (dim 716), Z: 0:833 (dim 834)

I want to create a subsampled version of A by once again using the
Extract Subset filter, with as VOI the full extents above and setting
its sample rates to 2. But to my surprise the subsampled dataset (using
PV 3.10.1 in standalone mode, btw) ends up having extents

  X: 514-825 (312), Y: 455-584 (130), Z: 0-416 (417)

and covers only the upper portion of A, not the whole set. I also don't
understand where the weird reduction in X and Y dimensions comes from
(factors 3.6 and 5.5, resp). See the attached screenshots.

Could this be related to the input dataset being stored in parallel format?

Best regards,
Paul
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